Update bower.json to not distribute codelabs.

Also updating description field to match Lovefield's gh-pages.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=104410636

bower.json

@@ -5,7 +5,7 @@
     "Google Inc."
   ],
   "private": true,
-  "description": "Lovefield - A Data Access Library",
+  "description": "Lovefield - A relational database for web apps",
   "main": "dist/lovefield.min.js",
   "keywords": [
     "lovefield"
@@ -16,6 +16,7 @@
     "node_modules",
     "bower_components",
     "builddef",
+    "codelabs",
     "demos",
     "docs",
     "examples",

package.json

@@ -2,7 +2,7 @@
   "name": "lovefield",
   "version": "2.0.63",
   "main": "dist/lovefield.min.js",
-  "description": "Lovefield - A Data Access Library",
+  "description": "Lovefield - A relational database for web apps",
   "keywords": [
     "lovefield"
   ],